Cavitation phenomena in hydraulic valves. Numerical modelling

被引：0
|
作者：
Bernad, Sandor [1 ]
Susan-Resiga, Romeo [2 ]
Muntean, Sebastian [1 ]
Anton, Ioan [2 ]
机构：
[1] Acad Romana, Ctr Adv Res Engn Sci, Timisoara Branch, Timisoara 300223, Romania
[2] Politech Univ Timisoara, Dept Hydraul Machinery, Timisoara 300222, Romania
来源：
PROCEEDINGS OF THE ROMANIAN ACADEMY SERIES A-MATHEMATICS PHYSICS TECHNICAL SCIENCES INFORMATION SCIENCE | 2007年 / 8卷 / 02期
关键词：
cavitation; vapour volume; vortex cavitation; poppet valve;
D O I：
暂无
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The paper presents a numerical simulation and analysis of the flow inside a poppet valve. First, the single phase (liquid) flow is investigated, and an original model is introduced for quantitatively describing the vortex flow. Since an atmospheric outlet pressure produces large negative absolute pressure regions, a two-phase (cavitating) flow analysis is also performed. Both pressure and density distributions inside the cavity are presented, and a comparison with the liquid flow results is performed It is found that if one defines the cavity radius such that up to this radius the pressure is no larger than the vaporization pressure, then both liquid and cavitating flow models predict the some cavity extent. The current effort is based on the application of the recently developed full cavitation model that utilizes the modified Rayleigh-Plesset equations for bubble dynamics.
引用
收藏
页码：151 / 160
页数：10
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